EP0140732A1 - Vorrichtung zum Aufheben einer verschmutzenden Schicht von der Wasseroberfläche - Google Patents

Vorrichtung zum Aufheben einer verschmutzenden Schicht von der Wasseroberfläche Download PDF

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Publication number
EP0140732A1
EP0140732A1 EP84401737A EP84401737A EP0140732A1 EP 0140732 A1 EP0140732 A1 EP 0140732A1 EP 84401737 A EP84401737 A EP 84401737A EP 84401737 A EP84401737 A EP 84401737A EP 0140732 A1 EP0140732 A1 EP 0140732A1
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EP
European Patent Office
Prior art keywords
flow
threshold
hull
central part
fraction
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP84401737A
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English (en)
French (fr)
Inventor
Henry Benaroya
Jean Le Foll
Jean-Elie Cadoux
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CADOUX JEAN ELIE
Original Assignee
CADOUX JEAN ELIE
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CADOUX JEAN ELIE filed Critical CADOUX JEAN ELIE
Publication of EP0140732A1 publication Critical patent/EP0140732A1/de
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B15/00—Cleaning or keeping clear the surface of open water; Apparatus therefor
    • E02B15/04—Devices for cleaning or keeping clear the surface of open water from oil or like floating materials by separating or removing these materials
    • E02B15/046—Collection of oil using vessels, i.e. boats, barges

Definitions

  • the invention relates to a device for the selective sampling of a layer of pollutant, such as a hydrocarbon, floating on the surface of a sheet of water capable of being subjected to swell, a device which can be used in particular for cleaning up covered areas. of a layer of oil following accidental spills.
  • a layer of pollutant such as a hydrocarbon
  • the patent application WO 83 01799 of the applicants describes such a machine of the type which comprises a hull provided with propulsion means making it possible to keep it in flight, the hull having a central part projecting forward with respect to two parts lateral which delimit, with the central part, supply conduits to separators and the central part having deflector means, such as wings, to create vortices whose orientation tends to reduce the divergence of the surface flow around the hull.
  • the deflector means make it possible to sweep the sea between two current lines which, upstream of the machine, have a spacing much greater than that which they would have in the absence of these means, and cause a thickening of the polluting layer at the entrance to the separator supply conduits.
  • the captured flow is limited by decreasing the depth at the level of the capture threshold formed by the floor and, simultaneously, the speed is reduced above of this threshold to maintain a river flow, which requires a Froude v / Vgh number less than 1. But it remains difficult to achieve this slowdown while completely eliminating a local divergence of the surface flow.
  • the invention proposes in particular to provide the front part of each lateral hull, immediately behind its bow, with a connecting vane with the submerged part of the central hull, in front of the bow of the lateral hull, drawn to deflect the flow of deep layers down and out.
  • This dawn can be constituted, on the major fraction of its length from the central part, of a wing in arrow of constant cord made up of identical profiles with flat lower surface (profile NACA 4515 for example), whose lower surface is wound in helix on a quarter of cylinder of revolution, the lower surfaces profiles constituting generators of the cylinder.
  • the deflection of the flow then strongly depends on the angles ⁇ and pfaits by the axis of the cylinder with the horizontal plane and the vertical plane of symmetry of the machine.
  • This wing-shaped fraction is connected to the front of the lateral part by a descending extension of this lateral part.
  • the submerged floor ensuring final capture will be given a form of fairing with a convex underside.
  • the leading edge of this floor will advantageously have a first horizontal shape with a strong arrow from the central part of the hull, then a decrease in the angle of the arrow and, at the same time, an upward slope for that the leading edge is connected to the apparent vertical contour line of the lateral part of the hull, which curves down to join the floor.
  • angles ⁇ and 8 will be chosen so as to avoid a significant divergence upstream of the bow of the lateral part, which implies giving a and / or ⁇ a positive value, sufficiently limited however so that the dawn does not not disturb the flow to the free surface. Frequently, values of "and s near 24 ° and 18 ° can be adopted, respectively.
  • the final collection flow is divided into three separate flows by two thresholds added to the first threshold constituted by the front part of the floor.
  • the second threshold which begins with a leading edge arranged horizontally, is placed so that the main fraction of the flow (generally 65 to 70% of the average final capture flow) falls below this threshold.
  • This main fraction leads directly to a propulsion pump which runs at constant power and speed in steady state. This main fraction therefore represents a practically constant flow during a swell period.
  • the third threshold is placed so that the fraction of the flow which passes over the free surface above represents a few percent of the sampling flow.
  • This fraction of the flow rate, which contains the pollutant, is injected into a separator which can be of the type described in patent application WO 83 01799.
  • the flow that goes on charge between the second and third thresholds bypasses the feed flow rate of the separator. It ends up, in the form of a blade passing over a tangential weir, in the well of a swell compensator.
  • the decontaminated flow coming from the separator is advantageously returned, by a second weir, in the same well.
  • This double objective can be achieved by adopting a passage section sufficient for the pipes.
  • the variations in level and load height are then practically in phase between the two ends of each pipe for the swell periods encountered in practice.
  • the required energy supply from the rotor remains moderate insofar as the average ejection speed chosen is significantly lower than the speed of the ship.
  • the rotor which operates at variable flow and may even be partially exposed, must be of robust constitution. It can be constituted by an axial pump driving the flow downwards. But it can also be very rudimentary, given the low power it has to develop. One can in particular use a simple wheel with longitudinal vanes which does not have risk of cavitation.
  • the total flow poured into the swell compensator well can vary, during a swell period, between 10 and 40% of the average flow captured during a period, while 75% of the flow medium are ejected by the propulsion pump.
  • the device which will now be described by way of example is intended for interventions either in coastal regions, or with the logistical support of a transport building for several devices of this type, provided for the intermediate storage of the pollutant sampled and collection.
  • the machine can have a length of about twenty meters and a width of about seven meters. Because of this short length, the ratio between its draft, generally Lement of the order of 3.50 m to take into account the expected swells, will be much lower than that encountered on a deep sea craft with high storage capacity and great length.
  • the machine comprises a hull 12 comprising a central part 10 and lateral parts 11 whose facing surfaces delimiting the grip channels have a general spiral shape (Figure 2).
  • the lateral surfaces constituting the wall of the central part are substantially vertical, as shown in Figure 1. This wall is designed to limit as much as possible the wave of bow which would generate turbulence.
  • the flow passing above the third threshold representing a few percent of the flow of water captured, is subjected to centrifugal separation in separators which can be of the same type as those described in patent application WO 83 01799, l clean water taken from the base of the separators joining the water taken between the second and third thresholds.
  • Front deflector means In the case illustrated in FIG. 1, these means comprise a jagged front wing 17 of "wound" shape, of the type already described in application WO 83 01799 to which reference may be made.
  • each lateral part 11 just behind the stem 13, extends downwards by a twisted zone of connection to the blade 14 which joins the bottom of the central part 10 very in front of the bow 13.
  • the blade 14. intended to deflect the downward and outward flow, has a constant chord wing profile with flat underside. This lower surface is wound in a helix on about a quarter of a cylinder of revolution (not shown) whose axis makes angles a and with the horizontal plane and with the vertical plane of symmetry.
  • the leading edge 15 of the blade 14 is first horizontal from the central part 10, with a large arrow, typically about °.
  • the cooperation of the blade 14 and the stem i3 of the lateral part causes a deflection of the deep layers indicated by the arrows f 0 in FIGS. 2B and 3, deflection which reduces the rate of final capture to a fraction less than 25 % of the input flow in the section delimited by the parts of the hull and the blade.
  • the final capture takes place above the first threshold 18 which is connected to the lateral part 11 between the pairs X 37 and X 38 ( Figure 3).
  • this threshold is constituted by the front part of a floor 19.
  • a second threshold 20, placed above the first, having a leading edge 21 behind that of the first threshold ( Figures 1 and 2B) ensures a first fractionation of the final collection flow.
  • this threshold is placed between the pairs X 40 and X 42 , that is to say far behind the first threshold.
  • Line 22, thus delimited, supplies a main propulsion pump 23 placed in a cavity 24 ( Figures 2B and 6). This propulsion pump discharges water through an exhaust pipe 26 opening to the rear of the ship.
  • a centrigure separator 28 with tangential injection which appears in Figures 2A and 2B at two different levels.
  • the pollutant taken from the upper part and from the center of the vortex produced by injection and tangential extraction in the separator is then sent to storage means which will be described later.
  • the pipe 30 for evacuating clean water from the separator 28 feeds as well as the water taken between the second and third thresholds 20 and 27, a swell compensator 31.
  • This compensator comprises a substantially cylindrical vertical well (FIGS. 2A, 2B , 5 and 6) provided with two weirs 32 and 33 of tangential feed ( Figures 2A and 5).
  • the weir 32 is supplied by 1 1 pipe 34 which opens upstream between the thresholds 20 and 27.
  • the oblique weir 33 is supplied by the depolluted water outlet pipe 30 which rises from the bottom of the separator, near the plane of symmetry of the machine, then emerges obliquely relative to the weir 33.
  • a rotor 35 shown only on the Figure 6, is placed in the well of the swell compensator 31 to maintain the level in the well at a value low enough that there is always a flooded overflow blade.
  • the water escapes tangentially to the lower part of the swell compensator well 31 towards the rear of the machine.
  • the rotor can be of very rudimentary construction and be limited to a wheel with longitudinal vanes.
  • Each tank 40 for storing water loaded with pollutant from the separator 28 is provided with a discharge pipe 41 and a dip tube 42 for injecting the water at the bottom of the tank in order to push back the upper layers rich in polluting by the pipe 41.
  • a connection 43 on the tube 42 provided with a stop valve and with an extraction pump 44, then makes it possible to discharge the pollutant-free water into the water table.
  • the tube 42 and the pipe 41 can be simply provided with connection fittings. the power required for operation being supplied by the support vessel.
  • the device can be completed by a vacuum connection 45 on the separator sampling tube 28, allowing the sampling of polluted water to be initiated.
  • FIG. 6 shows the locations 49 reserved for the storage of charged water and the drive means of the propulsion pumps 35. These means consist of a generator group 46 and an electric motor 47 per pump. Jet reversing flaps 48 can be provided on the ejection pipes 26 to allow the machine to be braked or to be steered. Vertical fixed planes 50 can be provided at the rear of the machine to stabilize the latter in yaw.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Cleaning Or Clearing Of The Surface Of Open Water (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Removal Of Floating Material (AREA)
EP84401737A 1983-09-01 1984-08-29 Vorrichtung zum Aufheben einer verschmutzenden Schicht von der Wasseroberfläche Withdrawn EP0140732A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8314051 1983-09-01
FR8314051A FR2551479B1 (fr) 1983-09-01 1983-09-01 Engin de prelevement d'une couche polluante a la surface d'une nappe d'eau

Publications (1)

Publication Number Publication Date
EP0140732A1 true EP0140732A1 (de) 1985-05-08

Family

ID=9291946

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401737A Withdrawn EP0140732A1 (de) 1983-09-01 1984-08-29 Vorrichtung zum Aufheben einer verschmutzenden Schicht von der Wasseroberfläche

Country Status (6)

Country Link
EP (1) EP0140732A1 (de)
JP (1) JPS6078895A (de)
DK (1) DK420284A (de)
ES (1) ES8505006A1 (de)
FR (1) FR2551479B1 (de)
NO (1) NO843466L (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2525584Y2 (ja) * 1991-04-01 1997-02-12 哲夫 西田 処理装置
CN110840343B (zh) * 2019-11-19 2021-09-21 中船重工(重庆)西南装备研究院有限公司 一种细格栅杂物清理机器人
CN115262507B (zh) * 2022-06-07 2024-01-30 赵子壹 一种河道漂浮垃圾自动清理系统
CN115198710B (zh) * 2022-08-29 2023-08-25 江西洪屏抽水蓄能有限公司 抽水蓄能电站进水口拦污装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437976A1 (fr) * 1978-10-03 1980-04-30 Foll Jean Le Engin de prelevement selectif d'une couche de liquide leger a la surface d'une nappe d'eau
EP0040129A1 (de) * 1980-05-08 1981-11-18 André Emile Grihangne Hochleistungs-Ölaufnahmevorrichtung zum Reinigen bewegter Wasseroberflächen
WO1983001799A1 (en) * 1981-11-23 1983-05-26 Henry Benaroya Device for selectively removing a light liquid layer at the surface of a water sheet

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437976A1 (fr) * 1978-10-03 1980-04-30 Foll Jean Le Engin de prelevement selectif d'une couche de liquide leger a la surface d'une nappe d'eau
EP0040129A1 (de) * 1980-05-08 1981-11-18 André Emile Grihangne Hochleistungs-Ölaufnahmevorrichtung zum Reinigen bewegter Wasseroberflächen
WO1983001799A1 (en) * 1981-11-23 1983-05-26 Henry Benaroya Device for selectively removing a light liquid layer at the surface of a water sheet

Also Published As

Publication number Publication date
DK420284A (da) 1985-03-02
JPS6078895A (ja) 1985-05-04
NO843466L (no) 1985-03-04
FR2551479B1 (fr) 1985-12-06
ES535523A0 (es) 1985-05-16
ES8505006A1 (es) 1985-05-16
FR2551479A1 (fr) 1985-03-08
DK420284D0 (da) 1984-08-31

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19880216